A deal died. Not because the terms were wrong — but because no one could prove the document hadn't been altered.

🚀 Live Demo →

Every year, $1.5 trillion in commercial contracts are disputed, delayed, or voided — not because of bad intent, but because of broken process.

A startup founder signs an NDA with a Fortune 500 partner. Three months later, the partner's legal team claims the document they received had different terms. There's no audit trail. No proof of when the watermark was applied. No cryptographic record of who generated what, and when.

The founder loses the deal. Possibly the company.

This isn't rare. It's the default state of legal document workflows in 2026:

• 📋 Agreements drafted manually in Word, emailed as attachments
• 🔓 No tamper-evidence — a PDF can be edited and re-saved invisibly
• 🕳️ No audit trail — "I sent it Tuesday" is not a legal defense
• ⏱️ Average contract turnaround: 3.4 days of back-and-forth

Foxit Sentinel Pro was built to make that story impossible.

Sentinel Pro is an auditable agreement orchestrator — a system that takes a legal template, injects the right data, generates a cryptographically-secured PDF via Foxit's API, and logs every single action in an immutable ledger. In under 30 seconds.

Type a company name or paste a deal brief. Sentinel Pro parses the context and populates the entire agreement — parties, governing law, term, compensation — in milliseconds. No copy-paste. No version confusion.

The populated template is sent to the Foxit PDF Services API, which renders a pixel-perfect legal document from HTML. This isn't a screenshot — it's a properly structured, print-ready PDF generated server-side.

The generated PDF is immediately watermarked (CONFIDENTIAL — ID: [unique hash]) and linearized for fast web streaming — both via Foxit's API. The watermark is applied server-side, making it impossible to strip without re-generating the document.

Every action — template selected, data injected, PDF generated, watermark applied — is SHA-256 hashed and written to a tamper-evident ledger. Stakeholders can verify document integrity at any future point.

Template Selected  →  SHA-256: a3f9c2...  →  09:14:22 UTC
Data Injected      →  SHA-256: b71e4d...  →  09:14:23 UTC
PDF Generated      →  SHA-256: c88f01...  →  09:14:51 UTC
Watermark Applied  →  SHA-256: d02a7c...  →  09:14:54 UTC
Linearized         →  SHA-256: e19b3f...  →  09:14:57 UTC

Browser (React + Vite)
        │
        ▼
Vercel Serverless Functions
        │
        ├── /api/health     → Environment check
        ├── /api/generate   → HTML → PDF  (Foxit API)
        └── /api/process    → Watermark + Linearize (Foxit API)
                │
                ▼
        api/_lib/
          ├── foxitClient.js   ← Foxit API client (ESM)
          └── templates.js     ← NDA, MSA, Offer Letter templates

All backend logic lives inside api/_lib/ as plain ES Modules — bundled directly within the serverless function boundary so Vercel deploys without a TypeScript compilation step.

• Node.js 18+
• Foxit Developer Account (Get credentials →)

git clone https://github.com/QuisTech/Foxit-Sentinel-Pro.git
cd Foxit-Sentinel-Pro
npm install

# Create .env with your Foxit credentials
echo "FOXIT_CLIENT_ID=your_id" >> .env
echo "FOXIT_CLIENT_SECRET=your_secret" >> .env
echo "FOXIT_BASE_URL=https://na1.fusion.foxit.com" >> .env

npm run dev

npm i -g vercel
vercel --prod

Set FOXIT_CLIENT_ID, FOXIT_CLIENT_SECRET, and FOXIT_BASE_URL in your Vercel project environment variables.

Click the "API Design Pattern v4.2" text in the footer to activate a self-driving demo that runs the complete workflow — autofill → generate → watermark → linearize → ledger — and saves a .webm recording automatically.

• Public Blockchain Ledger — Anchor audit hashes to Polygon for decentralized proof-of-existence
• Foxit eSign Integration — Direct pipeline from linearized PDF into eSign workflows
• Mobile Verification — QR scanner to verify document authenticity on-site

MIT License. Built for the Foxit Developer Challenge 2026.